Maine’s tea party governor, Paul LePage, already notorious for telling President Obama to “go to Hell,” wants to tell the NAACP to “kiss [his] butt” after they questioned his decision to pass on birthday events honoring Martin Luther King, Jr.

Mr. LePage made the remark after The Portland Press Herald reported on Friday that the organization felt slighted by the governor, a Republican who was elected in November.

Leaders of the group’s Maine chapters told the newspaper that Mr. LePage had declined several invitations from them in recent months, and they questioned whether he would look out for their interests.

Asked to respond, Mr. LePage, who had a reputation for combativeness on the campaign trail, said he had scheduling conflicts on Monday, when the federal holiday in honor of the Rev. Dr. Martin Luther King Jr. is to be observed. He also said the N.A.A.C.P. officials should “look at my family picture,” pointing out that he has an adopted son who is black.

“My son happens to be black,” LePage told a reporter for WGME-TV, “so they can do whatever they’d like about it.”

When the reporter asked Mr. LePage to respond to the suggestion that he had a pattern of slighting the N.A.A.C.P., he replied, “Tell them to kiss my butt,” adding, “If they want to play the race card, come to dinner; my son will talk to them.”